The stock tank is about 15 gallons. I'm getting around 20 MPG's with the 4-cylinder and 5-speed, stock gears on 31" tires. Keeping it tuned up and no vacuum leaks makes a world of difference.
110 miles on 1/2 a tank isn't too bad, but not the greatest either. I usually try for 150 miles on 1/2 a tank.
***--- Wrecking Crew member ---***
"I've prolly been around longer than you think"